3Com 3C17203 - SuperStack 3 Switch 4400, Руководство по началу работы

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Setting Up Overview 31
Automatic IP Configuration
By default the Switch tries to configure itself with IP information without
requesting user intervention. It tries to obtain an IP address from a DHCP
or BootP server on the network.
If neither server is found, the Switch will configure itself with an IP
address in the range 169.254.1.0 to 169.254.254.255. This is known as
Auto-IP and is the same mechanism used by Windows 98 and Windows
2000. IP addresses configured by Auto-IP are temporary as they cannot
be routed but are useful for small networks which are not connected to
other networks, or for initial configuration.
However, as soon as a DHCP or BootP server is detected, the Switch will
configure itself with the IP address allocated by that server.
When using automatic IP configuration it is important that the IP address
of the Switch is static, otherwise you will not know what the IP address is
and it will be difficult to manage. Most DHCP and BootP servers allow
static IP addresses to be configured so that you know what IP address will
be allocated to the Switch. Refer to the documentation that accompanies
your DHCP/BootP server.
For a detailed description of how automatic IP configuration operates,
please refer to the Implementation Guide that accompanies your Switch.
You should use the automatic IP configuration method if:
■
your network uses DHCP or BootP to allocate IP addresses, or
■
flexibility is needed. If the Switch is re-deployed onto a different
subnet, it will automatically reconfigure itself with an appropriate IP
address, instead of you having to manually reconfigure the Switch.
If you use the automatic IP configuration method, you need to view the
automatically allocated IP information before you can begin
management. Work through the
“Automatic Setup” section on page 38
and use 3Com Network Supervisor or connect to the console port to
discover the automatically allocated IP information.
DUA1720-3AAA03_online.book Page 31 Monday, March 25, 2002 10:48 AM